P CODES (POWERTRAIN) P0400 - P0499 P0420

I've Got A 96 Contour That Will Hesitate When You Press The Accelerator Until It Gets Warmed Up, Then Runs Fine. The Check Engine Light...

I Have A 2000 Ford Ranger With A 3.0 V6, My Check Engine Light Came On And It Is Throwing The Code P0420 Manifold Catalyst Efficiency Low...

My Van's Check Engine Light Is On. I Got The Code Read And It Shows A P0420. I Checked The Book And It Says It Is Catalyst System...

After Operation @ Highway Speed, If O Have To Immediately Drive Slow (e.G. If I Get Caught At A Red Light At The End Of An Exit Ramp) My...

2000 Mazda Protege 4 Cyl Front Wheel Drive 160000 Miles I Live In Tennessee And All Cars Must Pass Emissions Before They Can Be Tagged...

I Have Two Problems. First, Will A Bosch Platinum +2 4302 Fit My Engine. Second I Have A P0420 Bank 1 Code. How Can I Narrow It Down Cat...

Engine Problem 2003 Toyota Corolla 4 Cyl Wheel Drive Type Unknown Automatic 88400 Miles I Had A Diagnostic Test Done At Autozone...

Wondering If Any Saturn Techs Still Here That Might Have Some Ideas About A P0420 Low Catalytic Converter Efficiency. Thanks.

Check Engine Code P0420.

I Used My Programmer To Get Code P0420 And So I Took It To A Midas To Have Them Take A Look. The Guy Told Me That I Needed To Replace My...